Preparation and fourier transform infrared spectroscopy study of chitosan based oleic acid doped polymer electrolytes

Abstract

In this study, chitosan acetate-oleic acid films have been prepared by the solution cast technique where chitosan as a polymer host, and oleic acid as a salt. 1.0 g of chitosan powder was dissolved in 100 ml 6f 1.0% acetic acid. These film polymer electrolytes with different amounts of salt were investigated as possible ionic conducting polymers.Interaction between chitosan and the salt can be proven by infrared and Electrochemical Impedance Spectroscopy methods. The assymmetric and the symmetric CH2 stretch of pure oleic acid can be observed at 2919 and 2852 cm· 1 • When chitosan solution was added to oleic acid, the asymmetric and symmetric CH2 become more intense. These indicate chitosan-salt interactions. The highest conductivity at room temperature is 1.02 x 10·9 Siemens per centimeter for the film containing 10 wt.% of oleic acid.